Singer 20U33 - Page 14

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
position
block
to
the
left
or
right
as
required.
Securely
tighten
set
screw
when
correct
needle
location
is
ohtainec.
If
correct
needle
locations
cannot
be
obtained
by
making
the
above
adjust-
ment,
th.en
the
bight
and
needle
position.lever
and
bight
and
needle
Position
lever
arm
should
be
adjusted
as
follows.
a.
Loosen
bight
amplitude
slide
block
crank
set
screw
and
remove
bight
amplitude
slide
block
crank
shaft
in
order
to
move
bight
amplitude
slide
block
crank
out
of
the
way
to
make
adjustments.
b;
Loosen
the
two
bight
and
needle
position
lever
set
screws
and
adjust
bight
and
needle
position
lever
in
relation
to
bight
and
needle
position
lever
arm.
After
making
the
adjustment,
securely
tighten
the
two
set
screws.
c.
Replace
bight
amplitude
slide
block
crank
shaft.
set
bight
amplitude
slide
block
crank
in
proper
position
and
securely
tighten
the
slide
block
crank
set
screw.
If
needle
position
selector
is
not
in
alignment
with
the
marking
on
front
of
the
arm
standard,
readjust
bight
and
needle
position
block
in
the
same
way
as
instructed
above.
D.
SETTING
THE
LEFT
NEEDLE
POSITIO~
1.
Set
needle
position
selector
on
"left"
needle
position
and
turn
machine
pulley
to
bring
needle
to
its
lowest
position.
2.
Move
stitch
width
regulator
to
maximum
bight
a few
times
and
check
to
see
that
sidewise
movement
of
needle
is
within
1 - 2
mm.
If
needle
makes a
full
9
mm
swing,
turn
machine
pulley
over
toward
you one
complete
turn,
that
is,
raise
needle
to
the
top
once
and
bring
it
down
to
its
lowest
position
again,
then
check
sidewise
movement
of
needl~
as
instructed
above.
3.
If
needle
makes a
slight
sidewise
movement when
stitch
width
regulator
is
moved
to
its
maximum
bight,
this
should
be
corrected
as
follows.
Loosen
bight
and
needle
position
lever
arm
regulating
screw
nut
(right)
and
turn
bight
and
needle
position
lever
arm
regulating
screw
(right)
clockwise
or
counterclockwise,
as
required,
and
temporarily
tighten
set
screw.
Make
certain
the
sidewise
movement
of
needle
is
less
than
0.1
mm,
then
securely
tighten
set
screw.
E.
SETTING
THE
RIGHT
NEEDLE
POSITION
l.
Set
stitch
width
regulator
for
straight
stitching
and
needle
position
selector
on
"left"
needle
position.
Place
a
light
card
under
presser
foot,
turn
machine
pulley
and
make a
needle
puncture
on
the
card
in
the
same
way
as
above
and
measure
distance
between
left
and
right
needle
locations.
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12
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